Infant bonding means establishing a close and loving connection between a baby and their caregiver, such as a parent. It helps create trust and emotional attachment between them. Full definition
An attachment style describes the type of infant bonding that a baby forms with his or her primary caregiver - a bond that may be characterized as either secure or insecure. (positive-parenting-ally.com)
Attachment Parenting is based on more than 60 years of solid, interdisciplinary research into parent - child relationships, from infant bonding and breastfeeding to nurturing touch and discipline. (attachmentparenting.org)
Though the specific effects of parental presence on children is not fully understood, there's plenty of research on the importance of early parent - infant bonds for successful development. (gse.harvard.edu)